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WASHINGTON (Reuters) - A meteorite from Mars has been discovered in Antarctica, one of only about 30 known Martian space rocks on Earth.
"We've gotten something like 13,000 meteorites from Antarctica and this is only the sixth one from Mars," Timothy McCoy, curator of meteorites at the Smithsonian Institution (news - web sites), said by telephone on Wednesday.
The rest of the known Martian meteorites on this planet were found outside Antarctica, McCoy said by telephone.
What makes this rock special is its comparatively large size, he said: "It's a 700 gram rock (about 1.5 pounds) but by meteorite standards it's a mountain of material."
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